SGM3803 Description
The SGM3803 is a constant frequency, current mode, synchronous step-up switching regulator with 200mA negative charge pump inverter which generates an unregulated negative output voltage from an input voltage ranging from 1.4V to 5.5V. The device is typically used to generate +5V and -5V from battery. High switching frequency minimizes the sizes of inductor and capacitor.
SGM3803 Key Features
- 90% Efficient Synchronous Boost Converter
- Device Quiescent Current: 30µA (TYP)
- Less than 1μA Shutdown Current
- Input Voltage Range: 2.7V to 5.5V
- Output Voltage Clamping: 6V
- Adjustable Output Voltage Up to 5.5V
- Power-Save Mode for Improved Efficiency at Low Output Power
- Load Disconnect During Shutdown
- Low Reverse Leakage Current when VOUT1 > VCC
- 1.8V Logic on EN1 Pin for Control